Only things that really scared the sh*t out of me visually as a small child was the Exorcist and The Brood.
(And the clown scene from Poltergeist). And in Exorcist it was really when she started stabbing herself with the cross..my brain was like 'whoa'.
Oh and 'Audrey Rose' we would go in girls bathroom in grade school and shut lights and try to conjure Audrey Rose it was like a cult hit for a few years after it came out. It was a bit of a cult phenomenon.
there was another really eerie film I loved as a kid was with Donald Sutherland "Don't Look Now'
and there was one with Brooke Shields "Alice, sweet Alice' I have not seen in probably 30 years that was so creepy good.
I was a film buff as a child. The weirder the films the better.
I also loved Dario Argento films as a kid. I never saw all of them but like 3 or 4 I think.